Humidifier



FIG. 1 is a perspective view of a humidifier showing my new design;

FIG. 2 is a right side elevation view thereof on a reduced scale;

FIG. 3 is a front elevation view thereof on a reduced scale;

FIG. 4 is a left side elevation view thereof on a reduced scale;

FIG. 5 is a rear elevation view thereof on a reduced scale;

FIG. 6 is a top plan view thereof on a further reduced scale; and

FIG. 7 is a bottom plan view thereof on a further reduced scale. 

The ornamental design for a humidifier, as shown. 